What device was invented because of Faraday’s leap?

Generator

Hope this helps.

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Easy!
Momentum P = ma
Now... you've got mass m.
But you don't have acceleration in m/s^2.
Your acceleration is in rad/s^2. Just convert it into m/s^2. The circumference of a circle is 2*pi*radius.
Now: P = mass in kg x 2 x pi x radius in meters x angular acceleration in rad/sec^2